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TT: Fachverband Tiefe Temperaturen

TT 20: Correlated Electrons - Poster Session

TT 20.9: Poster

Wednesday, March 28, 2007, 14:00–17:45, Poster A

YbNi₂Si₃: a new Yb based intermetallic compound — Alexander Cosceev¹, Marc Uhlarz¹, Thomas Wolf², Peter Adelmann², •Kai Grube², Peter Schweiss², Georg Roth³, Rainer Fromknecht², Christoph Sürgers¹, and Hilbert v. Löhneysen^1,2 — ¹Physikalisches Institut, Universität Karlsruhe, Germany — ²Forschungszentrum Karlsruhe, Institut für Festkörperphysik, Germany — ³Institut für Kristallographie, RWTH Aachen, Germany

We have synthesized a new intermetallic compound YbNi₂Si₃ which crystallizes in the space group Immm with the metric a = 3.860Å, b = 3.862Å, and c = 24.068Å. Single crystals have been grown from Sn flux in a closed SiO₂ glass ampoule. Clean free-standing crystals could be obtained after dissolving the solid flux with liquid gallium and cleaning with a solution of iodine in dimethyl formamide. The magnetic dc susceptibility was measured parallel and perpendicular to the c axis. We find a rather strong anisotropy of the Curie-Weiss-like susceptibility down to 2.3 K. Measurements of the specific heat will be reported as well.